Automatic damper-regulator.



PATENTED NOV. 8, 1904.

J. P. WOOD. AUTOMATIC DAMPER REGULATOR.

APPLICATION FILED DEC. 31, 1903.

N0 MODEL.

UNITED STATES Patented November 8, 1904.

JAMES F. WOOD, OF ROSOOE, NEW YORK.

AUTOMATIC DAMPER-REGULATOR.

sI-EctFlcATlon forming part of Letters Patent No. 774,631, dated November 8, 1904.

Application filed December 31,1903. Serial No. 187.281. (No model.)

To (ti/Z whom it may concern:

Be it known that I, JAMES F. WOOD, acitizen of the United States, residing at Roscoe, county of Sullivan, and State of New York, have invented a certain new and useful Improvement in Automatic Damper-Regulators, of which the following is a specification.

My invention relates to a new and useful improvement in automatic damper-regulators, and has for its objectto provide a regulator which will operate the damper by the expansion and contraction of metal; and the object of this invention is to multiply the expansion and contraction and yet have the regulator in acompact framef and another object of my invention is to provide a convenient means for taking up lost motion and regulating the movement of the damper.

With these ends in view this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claim.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same, the construction and operation will now be described in detail, referring to the accompanying drawings, forming a part of this specification, in which Figure 1 is a side elevation of my improved regulator; Fig. 2, a front elevation of Fig. 1; Fig. 3, a similar view to Fig. 1, showing the metal expanded.

In regulators for automatically regulating the heat of afurnace I am well aware that the majority of them, if not all, depend upon the expansion and contraction of metal for actuating the damper to as to increase or diminish the draft upon the fire; but it is a wellknown fact that unless the expansible memher is of considerable length very little movement is imparted by the expanding and contracting of this member to the actuating mechanism, and therefore to have the expanding member ofa practical length the movement caused by the expanding and contracting of this member must be multiplied where it is communicated to the actuating-mechanism, and this multiplication of the movement must be done at the loss of power.

My invention is for the purpose of providing an extremely long expansible member, but so arranged and constructed that it will be in a compact space and can be easily eX- posed to the heat in the flue.

The construction consists of any suitable framework A in the form of standards. The

expansible member consists of a series of rods B. The lower end of the first rod B is fixed by means of a screw 0, threaded throughthe lower end of this rod, this screw being set upon an upward incline and swiveled in a downturned portion A of an extension A near the base of the frame. This rod B then extends upward and is pivoted to one end of a lever D, which lever is pivoted intermediate of its two ends at the point D to the standard A. To the other end of the lever D is pivoted a rod B, which extends downward and is pivoted to one end of a lever E, which lever is also pivoted intermediate of its two ends to the standard A at the lower end, and to the other end of this lever E is pivoted another rod B, which extends upward and is pivoted to one end of another lever D, and so on to the end. As many rods and levers can be provided as desired. The last rod B extends to the damper oractuating mechanism, and thus it will be seen that as the rod B is fixed and the last rod B is free to move the expansion and contraction of all the rods will be communicated through the levers D and E from one to the other, and thus the rod B will receive considerable movement, as illustrated in Fig. 3. The levers D and E may be pivoted nearer one end than the other, so that the movement transmitted through these levers will be further multiplied.

At the top of the frame A is secured at one end an arm E, through which,near the opposite end, passes the rod B said arm acting as a guide therefor.

As is usual in most regulators, the movement caused by the expansion of the metal is utilized to close the damper and the damper will be opened by a spring, the contracting of the metal allowing the spring to act, or the rod B might be connected directly to the damper, so that the contracting of the rod will open the damper without the need of a spring. For the purpose of taking up lost motion in the parts or for regulating the position of the damper the screw C may be threaded through the end of the rod B, and as the rod B is caused to move toward the head of the screw the rod will be raised on account of the incline of the screw, and therefore movement will be transmitted to the rod B which will regulate the position of the damper.

It will thus be seen by this construction of a regulator I am enabled to provide an expanding bar of any length desired, so as to obtain enough movement at the end to practically operate the damper, and at the same time the regulator may be made in extremely compact form, so as to be inserted in any part of the furnace or flue of the same desired for exposure to the heat.

Of course I do not wish to be limited to the exact construction here shown, as slight modifications could be made without departing from the spirit of my invention.

Having thus fully described my invention, what I claim as new and useful is In an automatic damper-regulator, a frame, an extension on the frame near its base, said extension terminating in a downturned portion, a screw swiveled in said portion, a series of levers pivoted intermediate their lengths in the upper end of the frame, a series of levers pivoted intermediate their lengths in the lower end of the frame, an expanding member comprising a series of rods, one end of the first rod being adjustably held by the screw in the extension of the frame, the other end of said rod being connected to one end of the first of theupper levers, another rod being connected to the other end of the first of the upper levers and extending downward and connected to one end of the first of the lower levers, and so on to the end, the last rod being free to move and adapted to be connected to the damper or actuating means therefor, and an arm secured at one end to the top of the frame adapted to act as a guide for the said last rod.

In testimony whereof I have hereunto affixed my signature in the presence of two subscribing witnesses.

JAMES F. WOOD. Witnesses:

MARY E. HAMER, L. WV. MORRISON. 

